Android app to check the balance of your Dhaka MRT Card.
Download here => https://github.com/aniruddha-adhikary/mrt-buddy/releases
100% UNOFFICIAL COMMUNITY EFFORT.
The FeliCa NFC Card stores the last 10 transactions performed by your card. That part of the memory is readable through NFC commands. Thus, the system does not require any API connectivity to servers. However, only limited to 10 transactions.
To get anything more than this, you'd need DMTCL to build something official.